65 lines
1.9 KiB
Plaintext
65 lines
1.9 KiB
Plaintext
|
type store is
|
||
|
|
record [
|
||
|
|
goal : nat;
|
||
|
|
deadline : timestamp;
|
||
|
|
backers : map (address, nat);
|
||
|
|
funded : bool;
|
||
|
|
]
|
||
|
|
|
||
|
|
entrypoint contribute (storage store : store;
|
||
|
|
const sender : address;
|
||
|
|
const amount : mutez)
|
||
|
|
: store * list (operation) is
|
||
|
|
var operations : list (operation) := nil
|
||
|
|
// const s : list (int) = list [1; 2; 3]
|
||
|
|
//const t : set (int) = set []
|
||
|
|
begin
|
||
|
|
if now > store.deadline then
|
||
|
|
fail "Deadline passed";
|
||
|
|
else
|
||
|
|
case store.backers[sender] of [
|
||
|
|
None -> store.backers[sender] := Some (amount);
|
||
|
|
// None -> patch store.backers with map sender -> amount end
|
||
|
|
| _ -> skip
|
||
|
|
]
|
||
|
|
end with (store, operations)
|
||
|
|
|
||
|
|
entrypoint withdraw (storage store : store; const sender : address)
|
||
|
|
: store * list (operation) is
|
||
|
|
var operations : list (operation) := list end
|
||
|
|
begin
|
||
|
|
// if set ["a"; "b"] contains x then skip else skip;
|
||
|
|
if sender = owner then
|
||
|
|
if now (Unit) >= store.deadline then
|
||
|
|
if balance >= store.goal then {
|
||
|
|
store.funded := True;
|
||
|
|
// patch store with record funded = True end;
|
||
|
|
operations := list [Transfer (owner, balance)];
|
||
|
|
};
|
||
|
|
else fail "Below target"
|
||
|
|
else block { fail "Too soon"; }
|
||
|
|
else skip
|
||
|
|
end with (store, operations)
|
||
|
|
|
||
|
|
entrypoint claim (storage store : store; const sender : address)
|
||
|
|
: store * list (operation) is
|
||
|
|
var operations : list (operation) := list []
|
||
|
|
var amount : mutez := 0
|
||
|
|
begin
|
||
|
|
if now <= store.deadline then
|
||
|
|
fail "Too soon"
|
||
|
|
else
|
||
|
|
case store.backers[sender] of
|
||
|
|
None ->
|
||
|
|
fail "Not a backer"
|
||
|
|
| Some (amount) ->
|
||
|
|
if balance >= store.goal or store.funded then
|
||
|
|
fail "Cannot refund"
|
||
|
|
else
|
||
|
|
begin
|
||
|
|
operations := list [Transfer (sender, amount)];
|
||
|
|
remove sender from map store.backers
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end with (store, operations)
|